Assuming it comes from Canada, that is. California’s uni is only a good alternative, and uni from Maine should simply be avoided. Got that? All of which is to say: This isn’t obvious. And it’d be a lot easier if restaurants took the burden of sustainability on themselves, as Fromartz points out. But they’re not. So you’re stuck asking if the tuna was pole-caught or not. And shouldn’t that piss all of us off more than it does? Just asking.